I've now got a Friendster, Facebook, Confabb and Digg account. Wanna guess what my user name is?
I've already gotten and heavily use a del.icio.us and Google/Gmail account. I have gotten MySpace and Blogger account, which I really don't use. I've had a Yahoo account and intend to use Flickr.
I don't intend to use these services equally, but persons younger than I use them extensively so better to know how to make best use, right?
If you have experience with these or other social networking services or site, and think they might be useful please say so in the comments.